______ of species is a reflection of their evolutionary relationships.
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Equus Caballus is the scientific name of _________.
Equinox occurs when the sun is vertically above .....
Growing agricultural crops between rows of planted trees is known as
Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil is called?
The maintenance functions of living organisms are performed by the _____.
The outermost layer of sun is called
What is the process of waste water treatment is commonly known?